Chemoreception Flashcards
1
Q
What is the importance of chemoreception? (4)
A
- food detection
- predator avoidance
- parental care
- location of spawning streams
2
Q
How do nurse sharks detect food?
A
- klinotaxis - concentration gradient searching behaviour
3
Q
How do teleosts and elasmobranchs detect food?
A
- amines and amino acids as triggers
4
Q
Salmon migrate to ___ stream for spawning. how does this happen?
A
- natal (origin)
- imprinted cues during migrations (premolts and smolts)
5
Q
What are possible triggers/cues during salmon migrations?
A
- Ca? Skin mucus?
6
Q
How do sea lamprey migrate?
A
- choose streams based on conspecific cues
7
Q
How do male lamprey choose spawning streams?
A
- larval bile acids in stream (indicates stream safe for spawning)
8
Q
How do female lamprey choose spawning streams?
A
- male pheromones
9
Q
What do paired nostrils help with?
A
- spacial info
10
Q
What is the effect of blocking a single nare?
A
- impairs direction finding
11
Q
What sense helps with migration?
A
- olfactory bulb electrical response
